docs: def bandWave(self):
          """Return the binned wavelength set most appropriate for the
          observation mode, as defined by ``pysynphot.locations.wavecat``.
          Also see :ref:`pysynphot-refdata`.
  
          Returns
          -------
          bandwave : array_like
  
          """
          if self.binset.startswith('('):
              return self._computeBandwave(self.binset)
          else:
              return self._getBandwaveFomFile(self.binset)